Injection molding device

Abstract

The utility model provides an injection molding device. The injection molding device comprises a first mold; the second mold is movably arranged relative to the first mold, an injection molding cavity is formed between the second mold and the first mold, a first exhaust groove is formed in the side, facing the first mold, of the second mold, and the exhaust groove communicates with the injection molding cavity so that the injection molding cavity can communicate with the external environment; and the multiple sets of heating assemblies are arranged, and the multiple sets of heating assemblies are arranged on the first mold and the second mold correspondingly. The utility model solves the problem that the appearance quality of a product is reduced as bubbles are easy to appear on the product produced by the injection mold in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection molding device. Background Art

[0002] Injection molds heat and melt plastic, then inject it into a mold using an injection machine. After injection, the mold cools, and the plastic product is removed after cooling. Injection molds can be divided into thermosetting plastic molds and thermoplastic molds. Thermoplastic molds are reusable and have lower costs than thermosetting plastic molds. With the continuous development of industrial technology, the size and functionality of injection molds are constantly increasing, and corresponding injection molding technologies are also constantly evolving. Injection molding technologies can be divided into warm pressure injection molding and ultrasonic injection molding. Injection molds require precise control of the heating and cooling processes, precise control of the injection port shape, optimized design of the coolant circulation path, and optimized mold structure. Currently, injection mold manufacturing involves melting the entire raw material and placing it in the injection mold. The raw material inside the mold is cooled by the mold's cooling system. Because the entire mold adopts a sealed design, gas that enters the mold cannot be discharged, resulting in bubbles or holes in the molded product, which reduces the product's appearance quality and affects the user experience.

[0003] As can be seen from the above, in the prior art, there is a problem that bubbles are easily generated on products produced by injection molds, which reduces the appearance quality of the products. Utility Model Content

[0004] The main purpose of the utility model is to provide an injection molding device to solve the problem in the prior art that bubbles are easily generated on products produced by injection molds, which reduces the appearance quality of the products.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an injection molding device, comprising: a first mold; a second mold, the second mold is movably arranged relative to the first mold, an injection cavity is formed between the second mold and the first mold, a first exhaust groove is provided on the side of the second mold facing the first mold, the exhaust groove is connected to the injection cavity to connect the injection cavity with the external environment; a heating assembly, the heating assembly is multiple groups, and the multiple groups of heating assemblies are respectively arranged on the first mold and the second mold.

[0006] Furthermore, the second mold includes: a mold base; a mold body, the mold body is arranged on the mold base, and the first mold, the mold body and the mold base are arranged in sequence up and down, and the mold body has a first exhaust groove on the side facing the first mold.

[0007] Furthermore, a second exhaust groove is provided on one side of the mold body facing the mold bottom plate, and the second exhaust groove is used to connect the injection cavity with the external environment.

[0008] Furthermore, there are multiple first exhaust grooves and multiple second exhaust grooves, and the multiple first exhaust grooves are arranged at intervals on one side of the mold body, and the multiple second exhaust grooves are arranged at intervals on the other side of the mold body.

[0009] Furthermore, the second mold also includes: a first liquid cooling pipeline, which is arranged in the mold body; a second liquid cooling pipeline, which is arranged in the mold bottom plate, and the first liquid cooling pipeline is connected to the second liquid cooling pipeline for cooling the second mold.

[0010] Furthermore, the first liquid cooling pipeline forms a first liquid cooling layer and a second liquid cooling layer, and the first liquid cooling layer and the second liquid cooling layer are arranged at intervals along the moving direction of the second mold. The first water inlet of the first liquid cooling pipeline is opened on the first liquid cooling layer, and the first water outlet of the first liquid cooling pipeline is connected to the second water inlet of the second liquid cooling pipeline.

[0011] Furthermore, the second mold further includes a sealing member, which is disposed between the first water outlet and the second water inlet and is used to seal the first water outlet.

[0012] Furthermore, the first mold includes a third liquid cooling pipeline, which is arranged in the first mold and along the circumference of the first mold. The third water inlet and the third water outlet of the third liquid cooling pipeline are arranged on the same side of the third mold.

[0013] Furthermore, the injection molding device also includes a heating element, and there are multiple heating elements. The multiple heating elements are respectively arranged on the first mold and the second mold at intervals, and the heating elements at least partially extend into the first mold or the second mold.

[0014] Furthermore, the injection molding device also includes an adjustment component, which is drivingly connected to a side of the second mold away from the first mold, and the adjustment component is used to adjust the distance between the second mold and the first mold.

[0015] According to the technical solution of the present invention, the injection molding device includes a first mold, a second mold and a heating assembly. The second mold is movably arranged relative to the first mold, and an injection cavity is formed between the second mold and the first mold. A first exhaust groove is provided on the side of the second mold facing the first mold. The exhaust groove is connected to the injection cavity to connect the injection cavity with the external environment. There are multiple groups of heating assemblies, and the multiple groups of heating assemblies are respectively arranged on the first mold and the second mold. The first exhaust groove is provided on the side of the second mold facing the first mold, so that the injection cavity is connected with the external environment. The first mold and the second mold are first heated to a preset temperature by using the heating assembly, and then the molten raw material is placed between the first mold and the second mold, and the second mold is controlled to be close to the first mold to achieve heat preservation and pressure maintenance. After the molten raw material is injected, even if air enters the injection cavity together with the raw material, the air can be discharged through the first exhaust groove, thereby avoiding the appearance of holes or bubbles after the surface of the raw material cools down, solving the problem that bubbles are prone to appear on products produced by injection molds in the prior art, which reduces the appearance quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an injection molding device in a specific embodiment of the present invention is shown; and

[0018] Figure 2 A schematic structural diagram of a first mold in a specific embodiment of the present invention is shown;

[0019] Figure 3 A schematic structural diagram of a third liquid cooling pipeline in a specific embodiment of the present utility model is shown;

[0020] Figure 4 A schematic structural diagram of a second mold in a specific embodiment of the present invention is shown;

[0021] Figure 5 A schematic structural diagram showing an angle of a mold body in a specific embodiment of the present invention is shown;

[0022] Figure 6 A schematic structural diagram showing another angle of the mold body in a specific embodiment of the present invention is shown;

[0023] Figure 7 A schematic structural diagram of a first liquid cooling pipeline in a specific embodiment of the present utility model is shown;

[0024] Figure 8 A schematic structural diagram of a second liquid cooling pipeline in a specific embodiment of the present invention is shown;

[0025] Figure 9 The figure shows a structural diagram of a heating element in a specific embodiment of the present utility model.

[0026] The above drawings include the following reference numerals:

[0027] 10. First mold; 11. Third liquid cooling circuit; 111. Third water inlet; 112. Third water outlet; 12. Glue injection port; 20. Second mold; 21. Mold base plate; 22. Mold body; 221. First exhaust groove; 222. Second exhaust groove; 23. First liquid cooling circuit; 231. First liquid cooling layer; 232. Second liquid cooling layer; 233. First water inlet; 234. First water outlet; 24. Second liquid cooling circuit; 241. Second water inlet; 242. Second water outlet; 25. Sealing element; 30. Heating component; 31. Heating element; 40. Adjustment component; 100. Injection cavity; 200. Product. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0030] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0031] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] In order to solve the problem in the prior art that bubbles are easily generated on products produced by injection molds and the quality of product appearance is reduced, the utility model provides an injection molding device.

[0033] like Figures 1 to 3As shown, the injection molding apparatus includes a first mold 10, a second mold 20, and a heating assembly 30. The second mold 20 is movably disposed relative to the first mold 10, forming an injection cavity 100 between the second mold 20 and the first mold 10. A first venting groove 221 is provided on the side of the second mold 20 facing the first mold 10. The first venting groove 221 is connected to the injection cavity 100 to connect the injection cavity 100 to the external environment. The heating assembly 30 is provided in multiple groups, and the multiple groups of heating assemblies 30 are respectively disposed on the first mold 10 and the second mold 20.

[0034] A first exhaust groove 221 is provided on the side of the second mold 20 facing the first mold 10, so that the injection cavity 100 is connected to the external environment. The first mold 10 and the second mold 20 are first heated to a preset temperature using the heating component 30, and then the molten raw material is placed between the first mold and the second mold, and the second mold 20 is controlled to be close to the first mold 10 to achieve heat preservation and pressure maintenance. After the molten raw material is injected, even if air enters the injection cavity 100 together with the raw material, the air can be discharged through the first exhaust groove 221, thereby avoiding the formation of holes or bubbles on the surface of the raw material after cooling.

[0035] like Figure 1 As shown, the second mold 20 includes a mold base 21 and a mold body 22. The mold body 22 is arranged on the mold base 21, and the first mold 10, the mold body 22 and the mold base 21 are arranged in sequence up and down, and the mold body 22 has a first exhaust groove 221 on the side facing the first mold 10.

[0036] Specifically, the mold base 21 and the mold body 22 are detachably connected, and the injection cavity 100 is mainly located on the mold body 22. When the first mold 10 is covered on the mold body 22, due to the presence of the first exhaust groove 221, the gas in the injection cavity 100 can be discharged immediately, thereby ensuring that the raw material is formed as attached. Figure 4 When the product 200 is shown, no bubbles or holes appear on the surface.

[0037] In this embodiment, the injection cavity 100 extends through the entire mold body 22, and the cross-sectional area of the injection cavity 100 on the side of the mold body 22 closest to the first mold 10 is larger than the cross-sectional area of the injection cavity 100 on the other side. It is understood that after the raw material is injected into the injection cavity 100, the raw material forms a structure with a larger top and a smaller bottom, and the appearance of the product 200 is consistent with the injection cavity 100.

[0038] like Figure 6 A second exhaust groove 222 is provided on one side of the mold body 22 facing the mold bottom plate 21 , and the second exhaust groove 222 is used to connect the injection cavity 100 with the external environment.

[0039] Specifically, a glue injection port 12 is provided on the first mold 10. When in use, the first mold 10 and the second mold 20 are heated to a preset temperature by the heating component 30, and the raw materials are injected into the injection cavity 100 through the glue injection port 12. As the raw materials are injected into the injection cavity 100, the gas at the bottom of the injection cavity 100 is discharged through the second exhaust groove 222, and the gas at the top is discharged through the first exhaust groove 221.

[0040] In this embodiment, there are multiple first exhaust grooves 221 and multiple second exhaust grooves 222 . The multiple first exhaust grooves 221 are spaced apart on one side of the mold body 22 , and the multiple second exhaust grooves 222 are spaced apart on the other side of the mold body 22 .

[0041] Specifically, the first exhaust grooves 221 are arranged in groups of two and spaced apart. Multiple groups of first exhaust grooves 221 are arranged at intervals along one side of the mold body 22. Similarly, the second exhaust grooves 222 are also arranged in groups of two and spaced apart.

[0042] like Figure 1 and Figure 4 As shown, the second mold 20 further includes a first liquid cooling line 23 and a second liquid cooling line 24. The first liquid cooling line 23 is disposed within the mold body 22. The second liquid cooling line 24 is disposed within the mold base 21. The first liquid cooling line 23 is connected to the second liquid cooling line 24 for cooling the second mold 20.

[0043] Specifically, the first liquid cooling line 23 and the second liquid cooling line 24 are respectively disposed on the mold body 22 and the mold base 21, and the two are connected. Water entering the liquid cooling line flows from bottom to top or top to bottom through the mold body 22 and the mold base 21 to cool the second mold 20. As the second mold 20 is cooled, the raw material in the injection cavity 100 is also gradually cooled, forming a product 200 that is consistent with the injection cavity 100.

[0044] like Figures 7 and 8 As shown, the first liquid cooling pipeline 23 forms a first liquid cooling layer 231 and a second liquid cooling layer 232, and the first liquid cooling layer 231 and the second liquid cooling layer 232 are arranged at intervals along the moving direction of the second mold 20. The first water inlet 233 of the first liquid cooling pipeline 23 is opened on the first liquid cooling layer 231, and the first water outlet 234 of the first liquid cooling pipeline 23 is connected to the second water inlet 241 of the second liquid cooling pipeline 24.

[0045] Specifically, the first liquid cooling layer 231 and the second liquid cooling layer 232 are located within the mold body 22 and are spaced apart vertically to uniformly cool the mold body 22. Each liquid cooling layer cools an area, and the two liquid cooling layers cool the circumference of the mold body 22. The first water inlet 233 is located at the top of the mold body 22, and the second water outlet 242 is located on the mold base 21. When cold water is injected into the first water inlet 233, the cold water flows downward through the first liquid cooling layer 231, reaches the second liquid cooling layer 232, and finally flows out of the second water outlet 242, completing the cooling of the mold body 22 and the mold base 21. To accommodate the structure of the mold body 22, two liquid cooling layers are provided at the same time. The number of liquid cooling layers is not limited to two and can also be more to improve the cooling effect. Similarly, multiple liquid cooling layers can also be provided on the mold base 21.

[0046] like Figure 8 As shown, the second mold 20 further includes a sealing member 25 , which is disposed between the first water outlet 234 and the second water inlet 241 and is used to seal the first water outlet 234 .

[0047] Specifically, a receiving groove is provided at the second water inlet 241 on the mold base 21. The seal 25 is placed in the receiving groove to seal the connection between the first water outlet 234 and the second water inlet 241. This prevents cold water from flowing out of the connection and causing mold leakage, which would affect subsequent processing. Optionally, the seal 25 is a rubber pad.

[0048] like Figures 1 to 3 As shown, the first mold 10 includes a third liquid cooling pipeline 11, which is arranged in the first mold 10 and along the circumference of the first mold 10. The third water inlet 111 and the third water outlet 112 of the third liquid cooling pipeline 11 are arranged on the same side of the first mold 10.

[0049] Specifically, the third liquid cooling line 11 is disposed circumferentially around the first mold 10. Cold water enters the third liquid cooling line 11 through the third water inlet 111, flows around the first mold 10, and then flows out through the third water outlet 112, completing the cooling of the first mold 10. The optional third liquid cooling line 11 can be a hose structure or a flow channel opened in the first mold 10.

[0050] like Figures 1 to 9 As shown, the heating assembly 30 includes a plurality of heating elements 31 , which are arranged at intervals along the circumference of the first mold 10 and the second mold 20 , and the heating elements 31 at least partially extend into the first mold 10 or the second mold 20 .

[0051] Specifically, one end of the heating element 31 is the heating end, and the other end is provided with a power cord. The multiple heating elements 31 are all connected to the same controller, so that the multiple heating elements 31 can start the heating mode synchronously or stop heating synchronously. This is conducive to controlling the working state of the heating assembly 30 and avoiding asynchronous temperature changes on the surfaces of the first mold 10 and the second mold 20, which may cause surface defects on the product 200. At least two heating elements 31 are provided on each side of the periphery of the first mold 10. The injection port 12 protrudes upward along the surface of the first mold 10, and the periphery of the injection port 12 is also provided with a heating element 31. The heating of the first mold 10 is achieved by using a single heating assembly 30. The multiple heating elements 31 provided on the second mold 20 are located in the same plane. The location and method of the heating element 31 can be selected according to the size of the second mold 20.

[0052] like Figure 1 As shown, the injection molding device further includes an adjustment component 40 , which is drivingly connected to a side of the second mold 20 away from the first mold 10 , and is used to adjust the distance between the second mold 20 and the first mold 10 .

[0053] Specifically, the adjustment component 40 includes a base and a telescopic part, the telescopic part is arranged on the base, and one end of the telescopic part is connected to the mold bottom plate 21. When the injection molding device is in use, the position of the first mold 10 is fixed, the adjustment component 40 adjusts the distance between the second mold 20 and the first mold 10 to make them closer, and the heating component 30 heats the first mold 10 and the second mold 20 to a preset temperature of 60°, and then maintains the current state of the heating component 30; then the raw material is injected into the injection cavity 100 through the glue injection port 12; when the raw material fills the entire injection cavity 100, the first mold 10 and the second mold 20 are pressure-maintained for 2 minutes; after the pressure maintenance is completed, the mold is cooled by the first liquid cooling line 23, the second liquid cooling line 24 and the third liquid cooling line 11, so that the mold temperature is reduced, thereby realizing the cooling and solidification of the raw material; the adjustment component 40 drives the second mold 20 away from the first mold 10, and then the product 200 is trimmed to remove burrs.

[0054] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: Figures 1 to 3As shown, the injection molding device includes a first mold 10, a second mold 20 and a heating assembly 30. The second mold 20 is movably arranged relative to the first mold 10. An injection cavity 100 is formed between the second mold 20 and the first mold 10. A first exhaust groove 221 is provided on the side of the second mold 20 facing the first mold 10. The first exhaust groove 221 is connected to the injection cavity 100 to connect the injection cavity 100 with the external environment. The heating assembly 30 is divided into multiple groups. The multiple groups of heating assemblies 30 are respectively arranged on the first mold 10 and the second mold 20. A first exhaust groove 221 is provided on one side of the mold 10, so that the injection cavity 100 is connected to the external environment. The first mold 10 and the second mold 20 are first heated to a preset temperature using the heating component 30, and then the molten raw material is placed between the first mold and the second mold, and the second mold 20 is controlled to be close to the first mold 10 to achieve heat preservation and pressure maintenance. After the molten raw material is injected, even if air enters the injection cavity 100 together with the raw material, the air can be discharged through the first exhaust groove 221, thereby avoiding the formation of holes or bubbles on the surface of the raw material after cooling.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0056] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An injection molding device, characterized in that: include: a first mold (10); a second mold (20), the second mold (20) being movably arranged relative to the first mold (10), an injection cavity (100) being formed between the second mold (20) and the first mold (10), a first exhaust groove (221) being provided on a side of the second mold (20) facing the first mold (10), the first exhaust groove (221) being in communication with the injection cavity (100) so as to connect the injection cavity (100) with an external environment; A heating assembly (30), wherein the heating assembly (30) is provided in multiple groups, and the multiple groups of heating assemblies (30) are respectively arranged on the first mold (10) and the second mold (20).

2. The injection molding device according to claim 1, characterized in that The second mold (20) comprises: Mould base plate (21); A mold body (22), wherein the mold body (22) is arranged on the mold base plate (21), and the first mold (10), the mold body (22) and the mold base plate (21) are arranged in sequence up and down, and the mold body (22) has the first exhaust groove (221) on the side facing the first mold (10).

3. The injection molding device according to claim 2, characterized in that A second exhaust groove (222) is provided on one side of the mold body (22) facing the mold bottom plate (21), and the second exhaust groove (222) is used to connect the injection cavity (100) with the external environment.

4. The injection molding device according to claim 3, characterized in that There are multiple first exhaust grooves (221) and multiple second exhaust grooves (222), and multiple first exhaust grooves (221) are arranged at intervals on one side of the mold body (22), and multiple second exhaust grooves (222) are arranged at intervals on the other side of the mold body (22).

5. The injection molding device according to claim 2, characterized in that The second mold (20) further includes: a first liquid cooling pipeline (23), wherein the first liquid cooling pipeline (23) is arranged in the mold body (22); A second liquid cooling pipeline (24), wherein the second liquid cooling pipeline (24) is arranged in the mold base plate (21), and the first liquid cooling pipeline (23) is connected to the second liquid cooling pipeline (24) for cooling the second mold (20).

6. The injection molding device according to claim 5, characterized in that The first liquid cooling pipeline (23) forms a first liquid cooling layer (231) and a second liquid cooling layer (232); the first liquid cooling layer (231) and the second liquid cooling layer (232) are arranged at intervals along the moving direction of the second mold (20); a first water inlet (233) of the first liquid cooling pipeline (23) is opened on the first liquid cooling layer (231); and a first water outlet (234) of the first liquid cooling pipeline (23) is connected to a second water inlet (241) of the second liquid cooling pipeline (24).

7. The injection molding device according to claim 6, characterized in that The second mold (20) further comprises a sealing member (25), wherein the sealing member (25) is arranged between the first water outlet (234) and the second water inlet (241) and is used for sealing the first water outlet (234).

8. The injection molding device according to claim 1, characterized in that The first mold (10) includes a third liquid cooling pipeline (11), which is arranged in the first mold (10) and along the circumference of the first mold (10). A third water inlet (111) and a third water outlet (112) of the third liquid cooling pipeline (11) are arranged on the same side of the first mold (10).

9. The injection molding device according to claim 1, characterized in that The heating assembly (30) includes a heating element (31), and the heating element (31) is multiple, and the multiple heating elements (31) are respectively arranged at intervals along the circumference of the first mold (10) and the second mold (20), and the heating element (31) at least partially extends into the first mold (10) or the second mold (20).

10. The injection molding device according to any one of claims 1 to 9, characterized in that The injection molding device further comprises an adjustment component (40), wherein the adjustment component (40) is drivingly connected to a side of the second mold (20) away from the first mold (10), and the adjustment component (40) is used to adjust the distance between the second mold (20) and the first mold (10).

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